I have been using the Harbor Freight 12v 100psi one for a little over a year, it gets borrowed every weekend we ride and has been abused on the trails. My buddy has a high dollar one i forget the name and mine is a whole lot faster than his.. its been a beast... all metal and good fittings. $35 without coupon.

Hate to say it, but if your compressor is working properly, it appears like a very good one for being a 12 volt unit. Big tires 85 PSI plus? For a semi, I'd have an air line with a glad hand coupler to plug in the semi to air the tires.

I have been using the Harbor Freight 12v 100psi one for a little over a year, it gets borrowed every weekend we ride and has been abused on the trails. My buddy has a high dollar one i forget the name and mine is a whole lot faster than his.. its been a beast... all metal and good fittings. $35 without coupon.

I used a 7 port manifold to make a device with 4 air lines, a gauge and a ball valve so I can deflate / inflate all 4 tires on the Jeep at once. This compressor works great! I've inflated my 4 33'' tires, and another set of 32'' tires without it overheating. Was really surprised at how well it works.

I also use it to inflate the 4 truck tires on my truck after putting it in and out of my garage.

I use a small 120v hot dog compressor on an inverter. It takes more space, but unless you want to spring for something like that ARB that is probably the only way you are going to upgrade from what you have.

I use a small 120v hot dog compressor on an inverter. It takes more space, but unless you want to spring for something like that ARB that is probably the only way you are going to upgrade from what you have.